Blanket-controller for calico-printing machines



(No Model.) 4 Sheets-Sheet 1. W. DUNCAN. BLANKET CONTROLLER FOR CALICOPRINTING MACHINES.

Patented May 23, 1893.

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4 N A O N U D BLANKET CONTROLLER FOR CALICC PRINTING MACHINES.

Patented May 23, 1893.

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W. DUNCAN.

BLANKET CONTROLLER FOR CALICO PRINTING MACHINES.

No. 497,953. Patented May 23, 1893.

(No Model.) 4 sheets- -sheet 4.

W. DUNCAN. BLANKET CONTROLLERFOR CALICO PRINTING MACHINES. No. 497,953.Patented May 23, 1893.

UNITED STATES PATENT OFFICE.

WVILLIAM DUNCAN, OF HARRISON, NEW JERSEY.

BLANKET-CONTROLLER FOR CALICO-PRINTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 497,953, dated May 23,1893.

Application filed January 29, 1889. Serial No. 297.913- (No model.

T0 on whom it may concern:

Be it known that I, WILLIAM DUNCAN, a citizen of the United States,residing at Harrison, in the county of Hudson and State of New J ersey,have invented certain new and useful Improvements in Blanket-Controllersfor Calico- Printing Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters and figures of reference marked thereon,which form a part ofthis specification.

The objects of this invention are to reduce the amount of labor andattention that has heretofore been required in keeping the blanket ofcalico printing machines from working to one side or the other of theprinting cylinder and guide roll, owing to the irregularity of pressureof the printing rolls on said blanket, or other causes; to enable anarrower blanket to be employed, and to reduce the amount of damage tosaid blanket because of its working laterally on said cylinder and rolland thus wearing against the frame of the machine.

The invention consists in the improved calico printing machine and inthe arrangements and combinations of parts substantially as will behereinafter set forth and finally embodied in the clauses of the claim.

Referring to the accompanying drawings embraced in four sheets in whichlike letters and figures indicate corresponding parts in each of theseveral views, Figure 1 is a side elevation of the improved machine,showing the relations of the cylinder, rolls and blanket of the machineto one another but devoid of certain parts of my improvements which areshown in detail in other figures. Fig. 2 is a detail elevation of asystem of mechanisms adapted to be engaged bythe blanket and to operateother mechanisms for changing the inclination of the guide roll so thatthe blanket will tend to work in an opposite direction thereon as willbe hereinafter fully explained. Fig. 3 is a detail section on line 00,Fig. 2. Fig. 4 is a detail side elevation, enlarged, of a guide roll andadjacent parts and mechanisms for automatically changing the inclinationof said guide roll so that, when the blanket works to one side of thesaid guide roll a limited distance, the inclination of said guide rollwill be changed and the blanket willat oncecommence to travel in theopposite direction toward the opposite end of the roll, as will beunderstood. Fig. 5 is a detail view taken in the direction indicated bythe arrowin Fig. 4. Figs. 5 and 6 are detail views hereinafter referredto. Fig. 6 is a downward view taken in a direction at right angles tothat of the said arrow. Fig. 7 is a sectional view taken on line y, Fig.5. Fig. 8 is a detail view taken in the direction of the arrows in Fig.6. Fig. 9 is a detail showing the operation of acertain pawl and ratchetwheel.

In said drawings, a indicates a suitable framework or bed frame of anysuitable c011- .struction adapted to the uses and purposes of a calicoprinting machine.

2) indicates the usual cylinder arranged therein, and over which theblanket 0 travels.

d, d, d, are the printing rolls, e the blanket rolls and f, the guideroll which operates to keep the blanket in proper relation to thecylinder and printing rolls. Said guide roll is arranged on a frame g,g, pivoted as at h to the bed frame a, at a central point between theends of the guide roll. Heretofore this pivotal frame was generallyoperated by hand so that,

as the blanket, in its lateral movement, ap:

proached the end of the guide roll in one or the other direction, theattendant would, by the use of an adjusting screw, change the positionof the roller in its relation to the blanket, turning the said roll onits frame and thus cause the blanket to travel in the opposite directionand thus avoid entering into contact with the bed frame. This movementcontinued until the opposite limit was reached when the attendant wouldagain adjust the guide roll. It will be seen that the guide roll thusrequired constant attention, which it is the principal object of thisinvention to avoid.

To secure an automatic adjustment of the guide roll, I have secured uponany suitable part of the frame a, as for example the bar '5 Figs. 1, 2,4, a bell crank or lever j, which is fulcrumed on said bar '5, as at 70,and carries or helps to carry a bar I. I prefer to have a link m inaddition to thebell crank for carrying said bar Z. Said link liesparallel with the portion j, Fig. 2, and moves therewith, being pivotedto the bar '6 and bar Z at equal distances from said portion j as willbe understood. Projecting from said bar Z, at the opposite ends thereof,are studs 01, shown in Figs. 2, 3 and 4 which engage the opposite V 5edges of the blanket, the said blanket working therebetween as will beunderstood. Said studs are preferably provided with anti-frictionrollers to prevent wear on said blanket. When the blanket engages one orthe other to of said studs, it causes it and the parts movable therewithto move laterally; this operates the bell crank and causes the movementof a pawl 0 on the pawl carrier p adjacent to the guide roll. The bellcrank and pawl are connected by the rod q. The pawl 0 is provided withboth a pulling and pushing arm, marked 0" and s respectively in Figs. 6and 9,

enable the pawl, 0, to either pull upon the 1 ratchet wheel whenoperated upon by the bell crank rod or to push the said wheel or liestationary and cause said wheel to turn when operated upon by mechanismshereinafter described, I provide the pulling arm with a hook 7' adaptedto draw on the ratchet-wheel to operateit in one direction, and thepushmovement and cause it to move pivotally in the opposite direction aswill be apparent upon inspection of Fig. 9. The said screw shaft it uponwhich the ratchet wheel is arranged, is 5 secured in bearings on the topframe a, the upper part of the top frame being provided with a guideroll frame a having arms a a which provide the bearings for the saidscrew shaft. 7 I

On the screw-shaft u, is arranged a nut or look o-which slides in a slota in the frame a under the influence of the screw shaft, the

said nut moving either backward or forward in accordance with themovement of said shaft 5 under the influence of the ratchet and pawl aswill be understood. The said nut or block U carries a lug or projectingpin Q) which enters a transverse slot w on the under side of the pivotedframe g. The movement of the lugged-nut causes said frame to movepivotally in'one direction or the other and thus change the relation ofthe roller f to the blanket, and cause the latter to travel in anopposite direction.

The pulling or pushing on the pawl by the wire q, tends to either movethe pawl to or from engagement with the ratchet; to secure an additionalmovement whereby the pawl throws the ratchet wheel in one or the otherdirection, I have given the pawl-carrierp a vibratory movement on itsbearings. To this end, I have provided on the end of the guide rolljournal f Figs. 4 and 8 an eccentric pin,

2, which works in a slot, 3, in the bar 4 of the pawl carrier so that asthe said eccentric pin,

2, moves with the journal of the guide roll the said bar, 4, is given areciprocating mover by links9. which engage the opposite sides of aratchet ment which is transmitted to the pawl and is effective in givingthe desired push or pull by which the ratchet-wheel is turned.

I prefer to construct the pawl-carrier as indicated in Figs. 4, 5 and 8.The said pawl 1s arranged on a stud or pin 5 arranged on a frame 6, 6,7, which latter is pivoted on the ends of the screw-shaft u at the baseof the arms a The slotted bar 4 is connected to the free end of thepivoted frame 6, 6, 7, by links or connections 8, so that the reciprocalmovement of said rod is transmitted to the frame 6, 6, 7, and the pawl0. The slotted bar, 4, and links, 8, are tied to the upper ends of thearms a and thus held in proper relative position,

The slot, 3,is of suitable length to allow for a considerable pivotalmovement of the guide roll, frame-q, and pin 2 as will be apparent.

In practice, I find it desirable to produce-a resistance-to the actionof the screw-shaft and ratchet wheel to prevent the pawl from turn- ;ingit too. freely and thus being affected by the back action or drag ofithepawl- To this end I employ a small spring 20-shown in: Figs. 5, 6, and 6which-is placed between the ratchet wheel and adjacent parts of theframe a ing arm with an abutment 5 to push on the 0 said ratchet wheelor resist its oscillatory While I have thusdescribedaneffective devicefor automatically regulating the gulde roll, I am aware that variouschanges, mod]- fications and equivalents may be employed and therefore Ido not wish to be understood as limiting myself to the exact devicepositively described.

Having thus described the invention, what I claim as new is-- 1. In acalico printing machine, the combi- '"nation with the guide roll andblanket, a pivotal frame, nut, 11, engaging said frame, a screw shaft,a, ratchet wheel, t, and pawl car- =rier pivoted on said shaft, and apawl engaging said ratchet wheel and operated by means engaged by theblanket, substantiallyas set forth.

2. In combination, a guide roll arrangedon a pivotal frame, a nut, 11,engaging said frame,

a screw-shaft operating said nut, aframe 6, 6,

7, pivoted on the ends of said screw shaft,- a ratchet wheel alsoarranged on said shaft, a

slotted bar, 4, linked or connected with the frame 6, 6, 7 and movabletherewith, an cecentric, 2, movable with the guide roll, a pawl arrangedon said frame and engaging the ratchet wheel and a rod, q, connectingwith means controlled by the blanket, all said parts being arranged andoperating substantially as set forth.

3. In a calico printing machine, the combination with a cylinder, andablanket, a-guide roll arranged on a pivoted frame and studs adapted toengage the edges of the blanket and train of mechanism connectingsaidstuds with said pivotal frame,.whereby the said pivoted frame isturned by the engagement of said blanket with said studs, substantiallyas set forth.

IIO

4. In a calico-printing machine, the combination with the cylinder, andguide roll arranged on a pivoted frame, a screw shaft,

lugged nut, ratchet wheel t, pawl 0, rod q, bell crank j and means forengaging the blanket substantially as set forth.

5. In a calico printing machine, the combination with the cylinder,guide roll and blanket, of studs for engaging the opposite edges of theblanket, means for communicating the motion given to said studs to apawl, a ratchet wheel and connections adapted to change the relation ofsaid guide roll to said blanket, substantially as set forth.

6. In a printing machine, the combination with the guide roll andblanket, cylinder and other means to support the blanket a ratchet wheelconnected with said guide roll and adapted to change the relation of thesame to January, 1889.

WILLIAM DUN CAN. WVitnesses:

ALFRED GARTNER, CHARLES H. FELL.

